Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mr. Mark Willer, BCBA

Individual provider Behavior Analyst · NPI 1609123835

Mr. Mark Willer, BCBA is a Behavior Analyst in Fairfax, Virginia. Practices as a sole proprietor. Licensed in Virginia.

Licensed in
VA
In the registry since
2012
What do these letters mean?
BCBA — Board Certified Behavior Analyst
Designs and supervises applied behaviour analysis programmes, often for autism.

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Practice location Address checks out

4102 Middle Ridge Dr
Fairfax, VA 22033-3226
Phone: (703) 507-9992
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Behavior Analyst (primary) Taxonomy 103K00000X · Licence 1-12-11579 (VA)

Record details

NPI number1609123835
Entity typeIndividual (Type 1)
GenderMale
Credentials BCBA
Sole proprietorYes
NPI enumeratedAugust 7, 2012
Last updated in NPPESAugust 7, 2012

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